X-Git-Url: https://git.delphigl.com/?p=LazOpenGLCore.git;a=blobdiff_plain;f=readme.txt;fp=readme.txt;h=0d5f495a163991677bf105dd5393eda82a6a7024;hp=0000000000000000000000000000000000000000;hb=1f9d3b8b9ce7d5e05f7af88c7ab0fd094609d9e5;hpb=5a2eeb45d528c5a2406b2ae5d73a4c711b2ea7dc

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+glBitmap by Steffen Xonna aka Lossy eX (2003-2008)
+http://www.opengl24.de/index.php?cat=header&file=glbitmap
+
+modified by Delphi OpenGL Community (http://delphigl.com/) (2013)
+
+------------------------------------------------------------
+The contents of this file are used with permission, subject to
+the Mozilla Public License Version 1.1 (the "License"); you may
+not use this file except in compliance with the License. You may
+obtain a copy of the License at
+http://www.mozilla.org/MPL/MPL-1.1.html
+------------------------------------------------------------
+The glBitmap is a Delphi/FPC unit that contains several wrapper classes
+to manage OpenGL texture objects. Below you can find a list of the main
+functionality of this classes:
+- load texture data from file (e.g. BMP, TGA, DDS, PNG, JPEG, ...)
+- load texture data from several other image objects (e.g. TBitmap, TLazIntfImage, SDL Surface)
+- save texture data to file (e.g. BMP, TGA, DDS, PNG, JPEG, ...)
+- save texture data to several other image objects (e.g. TBitmap, TLazIntfImage, SDL Surface)
+- support for many texture formats (e.g. RGB8, BGR8, RGBA8, BGRA8, ...)
+- manage texture properties (e.g. Filter, Clamp, Mipmap, ...)
+- upload texture data to video card
+- download texture data from video card
+- manipulate texture data (e.g. add alpha, remove alpha, convert to other format, switch RGB, ...)
+------------------------------------------------------------
+History
+20-11-2013
+- refactoring of the complete library
+- glBitmap is managed by git, so this history is not maintenanced any longer
+21-03-2010
+- The define GLB_DELPHI dosn't check versions anymore. If you say you are using delphi
+  then it's your problem if that isn't true. This prevents the unit for incompatibility
+  with newer versions of Delphi.
+- Problems with D2009+ resolved (Thanks noeska and all i forgot)
+- GetPixel isn't set if you are loading textures inside the constructor (Thanks Wilson)
+10-08-2008
+- AddAlphaFromglBitmap used the custom pointer instead the imagedatapointer (Thanks Wilson)
+- Additional Datapointer for functioninterface now has the name CustomData
+24-07-2008
+- AssigneAlphaToBitmap overwrites his own palette (Thanks Wilson)
+- If you load an texture from an file the property Filename will be set to the name of the file
+- Three new properties to attach custom data to the Texture objects
+  - CustomName  (free for use string)
+  - CustomNameW (free for use widestring)
+  - CustomDataPointer (free for use pointer to attach other objects or complex structures)
+27-05-2008
+- RLE TGAs loaded much faster
+26-05-2008
+- fixed some problem with reading RLE TGAs.
+21-05-2008
+- function clone now only copys data if it's assigned and now it also copies the ID
+- it seems that lazarus dont like comments in comments.
+01-05-2008
+- It's possible to set the id of the texture
+- define GLB_NO_NATIVE_GL deactivated by default
+27-04-2008
+- Now supports the following libraries
+  - SDL and SDL_image
+  - libPNG
+  - libJPEG
+- Linux compatibillity via free pascal compatibility (delphi sources optional)
+- BMPs now loaded manuel
+- Large restructuring
+- Property DataPtr now has the name Data
+- Functions are more flexible between RGB(A) and BGR(A). RGB can be saved as Bitmap and will be saved as BGR
+- Unused Depth removed
+- Function FreeData to freeing image data added
+24-10-2007
+- ImageID flag of TGAs was ignored. (Thanks Zwoetzen)
+15-11-2006
+- Function SetBorderColor implemented (only used by opengl if wrap is set to GL_CLAMP_TO_BORDER)
+- Function AddAlphaFromValue implemented to use an fixed Value as Alphachannel
+- Function ReadOpenGLExtension is now only intern
+29-06-2006
+- pngimage now disabled by default like all other versions.
+26-06-2006
+- Setting up an anisotropic filter of 0 isnt allowed by nvidia (Thanks Ogridi)
+22-06-2006
+- Fixed some Problem with Delphi 5
+- Now uses the newest version of pngimage. Makes saving pngs much easier.
+22-03-2006
+- Property IsCompressed and Size removed. Not really supported by Spec (Thanks Ogridi)
+09-03-2006
+- Internal Format ifDepth8 added
+- function GrabScreen now supports all uncompressed formats
+31-01-2006
+- AddAlphaFromglBitmap implemented
+29-12-2005
+- LoadFromResource and LoadFromResourceId now needs an Instance and an ResourceType (for ID)
+28-12-2005
+- Width, Height and Depth internal changed to TglBitmapPixelPosition.
+  property Width, Height, Depth are still existing and new property Dimension are avail
+11-12-2005
+- Added native OpenGL Support. Breaking the dglOpenGL "barrier".
+19-10-2005
+- Added function GrabScreen to class TglBitmap2D
+18-10-2005
+- Added support to Save images
+- Added function Clone to Clone Instance
+11-10-2005
+- Functions now works with Cardinals for each channel. Up to 32 Bits per channel.
+  Usefull for Future
+- Several speed optimizations
+09-10-2005
+- Internal structure change. Loading of TGA, PNG and DDS improved.
+  Data, format and size will now set directly with SetDataPtr.
+- AddFunc now works with all Types of Images and Formats
+- Some Funtions moved to Baseclass TglBitmap
+06-10-2005
+- Added Support to decompress DXT3 and DXT5 compressed Images.
+- Added Mapping to convert data from one format into an other.
+05-10-2005
+- Added method ConvertTo in Class TglBitmap2D. Method allows to convert every
+  supported Input format (supported by GetPixel) into any uncompresed Format
+- Added Support to decompress DXT1 compressed Images.
+- SwapColors replaced by ConvertTo
+04-10-2005
+- Added Support for compressed DDSs
+- Added new internal formats (DXT1, DXT3, DXT5)
+29-09-2005
+- Parameter Components renamed to InternalFormat
+23-09-2005
+- Some AllocMem replaced with GetMem (little speed change)
+- better exception handling. Better protection from memory leaks.
+22-09-2005
+- Added support for Direct Draw Surfaces (.DDS) (uncompressed images only)
+- Added new internal formats (RGB8, RGBA8, RGBA4, RGB5A1, RGB10A2, R5G6B5)
+07-09-2005
+- Added support for Grayscale textures
+- Added internal formats (Alpha, Luminance, LuminanceAlpha, BGR8, BGRA8)
+10-07-2005
+- Added support for GL_VERSION_2_0
+- Added support for GL_EXT_texture_filter_anisotropic
+04-07-2005
+- Function FillWithColor fills the Image with one Color
+- Function LoadNormalMap added
+30-06-2005
+- ToNormalMap allows to Create an NormalMap from the Alphachannel
+- ToNormalMap now supports Sobel (nmSobel) function.
+29-06-2005
+- support for RLE Compressed RGB TGAs added
+28-06-2005
+- Class TglBitmapNormalMap added to support Normalmap generation
+- Added function ToNormalMap in class TglBitmap2D to genereate normal maps from textures.
+  3 Filters are supported. (4 Samples, 3x3 and 5x5)
+16-06-2005
+- Method LoadCubeMapClass removed
+- LoadCubeMap returnvalue is now the Texture paramter. Such as LoadTextures
+- virtual abstract method GenTexture in class TglBitmap now is protected
+12-06-2005
+- now support DescriptionFlag in LoadTga. Allows vertical flipped images to be loaded as normal
+10-06-2005
+- little enhancement for IsPowerOfTwo
+- TglBitmap1D.GenTexture now tests NPOT Textures
+06-06-2005
+- some little name changes. All properties or function with Texture in name are
+  now without texture in name. We have allways texture so we dosn't name it.
+03-06-2005
+- GenTexture now tests if texture is NPOT and NPOT-Texture are supported or
+  TextureTarget is GL_TEXTURE_RECTANGLE. Else it raised an exception.
+02-06-2005
+- added support for GL_ARB_texture_rectangle, GL_EXT_texture_rectangle and GL_NV_texture_rectangle
+25-04-2005
+- Function Unbind added
+- call of SetFilter or SetTextureWrap if TextureID exists results in setting properties to opengl texture.
+21-04-2005
+- class TglBitmapCubeMap added (allows to Create Cubemaps)
+29-03-2005
+- Added Support for PNG Images. (http://pngdelphi.sourceforge.net/)
+  To Enable png's use the define pngimage
+22-03-2005
+- New Functioninterface added
+- Function GetPixel added
+27-11-2004
+- Property BuildMipMaps renamed to MipMap
+21-11-2004
+- property Name removed.
+- BuildMipMaps is now a set of 3 values. None, GluBuildMipmaps and SGIS_generate_mipmap
+22-05-2004
+- property name added. Only used in glForms!
+26-11-2003
+- property FreeDataAfterGenTexture is now available as default (default = true)
+- BuildMipmaps now implemented in TglBitmap1D (i've forgotten it)
+- function MoveMemory replaced with function Move (little speed change)
+- several calculations stored in variables (little speed change)
+29-09-2003
+- property BuildMipsMaps added (default = true)
+  if BuildMipMaps isn't set GenTextures uses glTexImage[12]D else it use gluBuild[12]dMipmaps
+- property FreeDataAfterGenTexture added (default = true)
+  if FreeDataAfterGenTexture is set the texturedata were deleted after the texture was generated.
+- parameter DisableOtherTextureUnits of Bind removed
+- parameter FreeDataAfterGeneration of GenTextures removed
+12-09-2003
+- TglBitmap dosn't delete data if class was destroyed (fixed)
+09-09-2003
+- Bind now enables TextureUnits (by params)
+- GenTextures can leave data (by param)
+- LoadTextures now optimal
+03-09-2003
+- Performance optimization in AddFunc
+- procedure Bind moved to subclasses
+- Added new Class TglBitmap1D to support real OpenGL 1D Textures
+19-08-2003
+- Texturefilter and texturewrap now also as defaults
+  Minfilter = GL_LINEAR_MIPMAP_LINEAR
+  Magfilter = GL_LINEAR
+  Wrap(str) = GL_CLAMP_TO_EDGE
+- Added new format tfCompressed to create a compressed texture.
+- propertys IsCompressed, TextureSize and IsResident added
+  IsCompressed and TextureSize only contains data from level 0
+18-08-2003
+- Added function AddFunc to add PerPixelEffects to Image
+- LoadFromFunc now based on AddFunc
+- Invert now based on AddFunc
+- SwapColors now based on AddFunc
+16-08-2003
+- Added function FlipHorz
+15-08-2003
+- Added function LaodFromFunc to create images with function
+- Added function FlipVert
+- Added internal format RGB(A) if GL_EXT_bgra or OpenGL 1.2 isn't supported
+29-07-2003
+- Added Alphafunctions to calculate alpha per function
+- Added Alpha from ColorKey using alphafunctions
+28-07-2003
+- First full functionally Version of glBitmap
+- Support for 24Bit and 32Bit TGA Pictures added
+25-07-2003
+- begin of programming